Originally Posted by glhcarl
How do you get the ground spoilers to deploy when you have no hydraulic power?
You made me think, glhcarl! The answer is, the flight manual procedure using the spoilers was for loss of systems 1,2,3, in which case all pitch control was lost. You could use the ground spoilers, powered by remaining system 4 to make rough pitch corrections. Systems 1,2,4 caused loss of roll control.
Cannot understand why Lockheed did not make the flight controls symmetrical down to one system--easily doable, the L-1011 was.
GF